Cortical activation during sleep predicts dream experience in narcolepsy
Open accessAbstract
Objective: Narcolepsy type 1 widely affects the architecture of sleep with frequent fast transition to REM sleep at both nighttime and daytime sleep onset. The occurrence of repeated sleep onset REM periods over the Multiple Sleep Latency Test offers a unique opportunity to identify EEG patterns predictive of successful dream recall after short periods composed of only REM or NREM sleep. It also permits to disentangle state- from trait-like differences in dream recall, by using a within-subjects design. Methods: A consecutive series of 115 first-diagnosed drug-free adult narcolepsy-type 1 patients underwent Multiple Sleep Latency Tests and were asked after each nap opportunity if they had or had not a dream experience. Scalp EEG power and a specific index of cortical activation (delta/beta power ratio), obtained from naps of 43 patients with both presence and absence of dream recall in the same sleep stage, were compared separately for REM and NREM sleep. Results: Successful dream recall was associated with an increased EEG desynchronization in both REM and NREM over partially overlapping cortical areas. Compared to unsuccessful recall, it showed (1) lower delta power over centro-parietal areas during both stages, (2) higher beta power in the same cortical areas during NREM, and (3) lower values in the delta/beta ratio during NREM in most scalp locations. Interpretation: A more activated electrophysiological milieu in both REM and NREM sleep promotes dream recall, strengthening the notion that the parietal areas are crucial not only in generating dream experience, as shown in brain-damaged patients, but also in the memory processing leading to recall.
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Theta activity and EEG characterized by high cortical activation appear crucial in the production and retrieval of DE.
“Once again, the theta activity (Marquis et al., 2017) and the EEG characterized by high cortical activation (Simor et al., 2013; D'Atri et al., 2019) appear to be crucial in the production and retrieval of DE.”
From The Functional Role of Dreaming in Emotional Processes (2019) · cites this paper as D'Atri et al., 2019
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Self-citation
- Authors
- D'Atri, A., Scarpelli, S., Schiappa, C., Pizza, F., Vandi, S., Ferrara, M., Cipolli, C., Plazzi, G., & De Gennaro, L.
- Affiliations
- Department of Psychology University of Rome “Sapienza” Rome Italy
- Sapienza University of Rome (IT)
- Istituto delle Scienze Neurologiche di Bologna (IT)
- Department of Biotechnological and Applied Clinical Sciences University of L'Aquila L'Aquila Italy
- University of Bologna (IT)
- Venue
- Annals of Clinical and Translational Neurology
- Publisher
- Wiley
- Published
- 2019-02
- Volume
- 6
- Issue
- 3
- Pages
- 445-455
- ISSN
- 2328-9503 (ISSN-L)
- PMC
- PMC6414482
- OpenAlex
- W2914213838
- Cited by
- 27
- References
- 37
- Citations by year
- 2026: 2 · 2025: 4 · 2024: 1 · 2023: 3 · 2022: 6 · 2021: 4 · 2020: 5 · 2019: 2
- FWCI
- 2.47
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Annals of Clinical and Translational Neurology (publishedVersion, cc-by-nc-nd)
- Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion, other-oa)
- IRIS UNIMORE (University of Modena and Reggio Emilia) (submittedVersion, cc-by-nc-nd)
- IRIS Research product catalog (Sapienza University of Rome) (submittedVersion, cc-by-nc-nd)
- Archivio Istituzionale della Ricerca - Università degli Studi dell Aquila (submittedVersion, cc-by-nc-nd)
- Funders
- Fundação Bial (#32/16)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
- Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Neuroscience of respiration and sleep
- Keywords
- narcolepsy type 1, dream recall, REM sleep, NREM sleep, cortical activation, EEG desynchronization, parietal cortex, sleep onset REM periods, multiple sleep latency test
- MeSH terms
- Adult, Cerebral Cortex, Dreams, Electroencephalography, Female, Humans, Male, Middle Aged, Narcolepsy, Mental Recall, Sleep, Sleep Wake Disorders, Sleep Stages, Sleep, REM, Polysomnography
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